# Relationship history for MSHA mine 0503182

Current hierarchy: **Hicks Carl → R D H Company → Longfellow Claim**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Thor Inc → Longfellow Claim; 1978-03-09 to 1979-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Ogden Dan → Longfellow Claim; 1978-03-09 to 1979-08-20; source msha-controller-operator-history
- **controller_controls_operator:** Ogden Dan → Thor Inc; 1978-03-09 to 1979-08-20; source msha-controller-operator-history
- **operator_operates_mine:** R D H Company → Longfellow Claim; 1979-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hicks Carl → Longfellow Claim; 1979-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hicks Carl → R D H Company; 1979-08-21 to current/open; source msha-controller-operator-history